Coil winding machine



y 10, 1934- c. H. THORDARSON 1,965,754

COIL WINDING- MACHINE Filed Feb. 24, 1930 4 Sheets-Sheet l.

y 10, 1934- c. H. THORDARSON 1,955,754

COIL WINDING MACHINE Filed Feb. 24, 1 50 4 Sheets-Sheet 2 v I 10 5? az .27 e' i la; 1 1 1B 1 l I l 17 1 2a. n 1 1 1 c/gg 30 \l C D Q) w, r 23 (fieaf'r/Y M my July 10, 1934. c. H. THORDARSON 1,965,754

I COIL WINDING MACHINE Filed Feb. 24. 1930 4 Sheets-Sheet 3 M 151 Q i W k & ,7

6&65757fl 771070275071,

Patented July 10, 1934 t "U IT D.

Chester H;Tl 1ordarson, Chicago, Ill. Application February 24, 1930, Seria1 Dim-430,815 V 6 Claims; (oi 2164 6 e V f This inventionrelates to improvements in means "and in the process for winding-transformer coils and thelike.

- The main object of the invention is to'provid'e' 8 a method and means for producing coils or mechanical and electrical uniformity at low cost and in'large quantities. n

By my invention sheet materials, such as sheet copper,- is fed from a roll, out intoribbons of the desired width and each ribbon fed to an individual arbor where it, together with the necessary insulation, is wound into a coil under uniform conditionsoftension so that a uniform product is ob tained.

Furthermore, by the use of my invention the machine may be simple, compact, easily adjusted and operated, and finished coils may be removed and new ones started with great ease.

accompanying drawings, in which; I v

Figure 1 is a side elevation of the winding ma hine;

r Fig. 2 is a view on an enlarged scale of I such-as isproduced by'the machine? t Fig. 3 is a perspective view to] illustrate the a coil manner in whichthe stock sheet is fed intofthe rolls;

Fig. 8 is a cross sectional 'fragnient'al" view of therollsj v Fig. 9 is a section taken through the axis of one" of'the winding shafts; r Fig. 10 is across section of the frictional driving connection for the winding shaft;

The machine illustrated by the drawings com'-' prises, a frame consisting ofa bed plate 2-which may be bolted to a supporting pillar 1, side plates 3, arms 3a,- 4 and 24 for supporting thevarious parts. A roll of thin sheet copper or other conducting material, from which the coils are to be wound, is shown at 7 mounted soasto turn upon'a shaft resting in open bearings. 8. The sheet material is fed from this roll over guide roll 9 and under and over straightening rollslmflthrough the tensioning device 11 'to'the feeding'landfcut ting rolls 12 and, 12a. Therebheetmaterialis cut into ribbons of the desired; width by the rolls 12 and 12a and the salvage, which ordinarily One form of my invention is illustrated by the is somewhat'dama'ged-trimmed oif.- Then one ribbon'is led between guide rolls 21 to an arbor 33 on shaft 22. The next-ribbon is fed in a similar way to anarbor 33a on'shaft 22a, and so on, said I arbors comprising the forms upon which the coils 00: are wound. The edges or selvage of the sheet material which, as heretofore stated, is not generally suitable for use is fed between thesame guide rolls 21 too. scrap reel 23. i The number'of coils which can be' wound simultaneously corresponds, of course, to the number o'f ribbons into which the copper sheet is cut by the feeding and'slitting rolls 12 and 12a. The coils are spaced upon'shafts 22 and 22a 30 that they are directly in line with the direction of travel of the respective copper ribbons asthey ccmefrom the guide rolls 21. Shafts 22 and 22a are-preferably mounted on opposite sides of the machine'at equal distances from its vertical axis shown in Fig. 6, so that the length of each ribbon between the rolls 12 'and12a and the arbors' 33 and 33a substantially the same. In this way; whateverstretching'occurs willbe substantially:the same for each ribbomsince', as will-be heremafter -explained, the tension upon all of the ribbons is the same: The insulating material which is to be'wound between the layers of copper ribbon is supplied from rollsf6 and 611., one roll being provided for each coil and so spaced, as shown in Fig. 4,*-th"at each is in the same plane asthe coil withwhich it relates. Tension; upon the insulation is provided by tensio'nin'g vices 123, as shown inFigJS. t 5 Uniform tension upon the sheet copper-and the copper ribbons is obtained in the following 9 manner-:

heretofore stated, the sheet copper before slitting through a tenfsionirig' device 11,-" This device consists of a plate 111 supported By frame 3 and a; felt pad 13' which is held against plate 111 bye, suitable backing plate 14 bolted to plate 111 at either end;'as shown in Fig. 4. The copper sheet is pass'edbetween plate lliand' the felt pad 13, and in'this wayuniform tension is provided above the feeding and cuttingrolls Hand-12a. 1 Feeding and cuttingrolls 12 and 12a each con--, sists, asshown in Figs. 7 and 8, of a plurality oflsteel cutting discs 16, each of a width corresponding to the width of the copper ribbon and spaced apartby spacing rings 18 a'correspond-w ing distance, Spacing rings 18 are of a smaller diameter than cutting'discs 16, and each of them is surrounded by a resilient ring 15 'ofjrubber or suitable material, the outer diameter of which is substantially equal to the outer diameter of cutting discs 16. As shown in Fig. 8, the cutting discs 16 of roll 12 are so positioned with respect to the similar cutting discs of roll 1211, that each disc is opposed by one of the resilient rings 15 and so that the edges of the cutting discs of a one roll coact with those of the other roll to form a shearing device whereby the copper sheet may be cut into ribbons-as it is fed intothe rolls. In order to insure perfect shearing it is, preferable, although not essential, that the cutting edges of the discs of one roll' should pass between those" the earlier forms wherein the material was panes through the cutting device, ,sincejthe tension is absolutely uniform and the ribbons cleanly cut and free from rough edges. Fig. 3 illustrates diagrammatically the copper sheet cut into ribbonsujust after it has passed between the rolls 12 and 12a. This diagram-- 1' driven parts, ;A motor 3'7, mounted upon the supportingpillarl, or .in any other convenient position drives through a-belt, large pulley-38. A sprocket wheel 39 positively attached to.pul-. 1ey 38 and, consequently, turning with it, drives through chain 40, large sprocket 41; rotatably.

mounted upon shaft 17. Anothersprocket 41a attached to and upon thQ'S meshaft a s.- sprocket 41 drives sprocket 42 which-constitutes :ja part of a frictional drive, device in which sprocket .42.:

t; also included, and lay-means of which a :uni.-.

form winding speedlis imparted to shaft 22a 0011-. trolled by the, tension upon, the copper ribbons ra he y ha t ev speed jt emotor.

- L a r ge sprocket 4 1 is; duplicated upon theother side of the machineand cooperates witha duplir' oate set of parts ideriticaltothose just described to part-a similar :controlled winding speeito the other winding sha-ft22i y ;T he.:friction drive of whichsprockets 42 and -"i 42ghave been referredto as parts is shown in detail in Fig. 10. Sprocket 42 is freely mounted upon; shaft 44.; Its innerface is provided with one member g18-of-a cone or other suitable clutch. Sprocket 42a is similarly'freely mountedjupon' shaft 44;; and carries the Y complementary member 49 of the clutchin its outer face. Ariadjustablecpressurel. ring 53.. provides a means whereby the pressure of the Itwo clutch elements maybe regulated through the nut 52. In this way, thesmall sprocket 42 may turn at one speed and the large sprocket 42a at another, so'that the desired winding tensionfmay be'secured in dependently of the actual speed of the motor.

1: Scrapreel 23 may be driven, as'shown in Fig.

lockthe winding arbor to the shaft.

coils may be conveniently and quickly removed from the machine and new arbors substituted upon which to wind additional coils. In the lower ends of arms 24 of the frame are bushings 26 and 27, as shownin Fig. 9. One of these bushings, 27, is provided at its outer end with a bearing for the sprocket 30 which drives the winding shaft 22a. This sprocket rotates freely upon this bearing, being heldin position by some such means as aset screw 31 engaging with an annular? recess 32 in the bushing. The winding arbor 33 is provided with a longitudinal channel, through which 1 shaft 22 may be passed and also witha key 35 which engages with a keyway cut in'shaft 22 to Shaft 22 also projects through bearing 27 and into the hub of sprocket 30, where the same keyway engages with a key 36 to also lock the shaft to drive sprocket 30. By these means power applied to sprocket 30 will be transmitted to shaft 22 and t ine. arbor t atp ame i ha e il t dr wn nd windi larbc 33 with the coils thereon removed from the machine and a new arbor for additional coils putin its p H. 10

It will be seen that in my device the conducting material in sheet form is fed under constant tension to and through the feed ng and slitting rolls and to the winding rolls; thattheiength and tension uponeach ribbon is-the sameso that each may be expected to stretch to the sam degree;- that by means of the frictional drive the tension under which the coils is wound. isuniform and; easily controlled; that the removal and replace; men of the w n i r r m be efie t d w t the greatest of ease and dispatch 7, It 'll be understood thatjhe drawings are-for; purposes of a illustration only and disclose only 1 a n m r o o m of m Y GQ th many other forms are possible without departing rom h o aq 'm i ti n; 1.

It will also be understood that while I; have, shown f orpurposes of illustration 2. machine adapted for winding rectangular coils-any other s a q e e oun 't q 2 913 b ha inst s p -0 t e Iclaim: v V 1 1-: In-a sheet slitting andcoil winding machine, a pair of composite positively driven rolls adaptedv to feed andslit sheetlstockmaterial into ribbons, a winding shaft associated with saidrolls adapted to wind the ribbonsinto separate coils, agdrivefor said rollsga frictionally driven connection from the rolls to said shaft, and means for vadjustin the tension of said driving connection. a 130 2.. In asheet slitting and coil winding machine, positively driven means for the combinedfeeding and slitting into ribbons sheet stock, means for maintaining a uniform tension upon the sheet, means for winding said ribbons intoJcoils-and means for maintaining any desir'ecl'tension upon: the ribbons while winding them into'coils.

- '3. In a sheet slitting and coil winding machine; a pair of power driven rolls for feeding and slitting into ribbons sheet stock, each consisting of a series of alternate concentric cutting and cushionringsthe cutting ringsof one rollop'posing the cushion rings of theother roll and slightly intermeshing with the cutting rings of the other roll, winding shafts, removable'winding arbors on said shafts, a frictional drive from said rolls to said, shafts, and means in-said drive for maintainingfanydesired tension upon theribbons while 4. In a sheet slitting and coil winding machine, a pair of rolls for slitting sheet stock into ribbons, each roll being provided with cutter rings, cushion rings between the cutter rings, said cushion rings on one roll opposing the cutter rings on the other roll and having yieldable peripheral inserts, winding arbors for receiving the ribbons, means for driving said rolls, means for driving said winding arbors, and means for maintaining a uniform tension upon the ribbons being wound upon said a-rbors.

5. In a sheet slitting and coil winding machine, a pair of positively driven rolls for the combined feeding and slitting into ribbons of sheet stock, winding arbors for receiving the ribbons and winding them into coils, means for feeding ining the sheet stock from said means and slitting it into ribbons, a plurality of winding arbors for simultaneously winding the ribbons into coils, means for feeding insulating strips between the coil turns, and means for driving the rolls and arbors.

CHESTER H. THORDARSON. 

